How Kalyvor keeps your files private
Encryption in transit, immediate deletion and what browser-side processing actually means.
4 min read
Developer utilitiesFreeFastPopular
Regex Tester
Test a regular expression against sample text and see every match, its position and its capture groups — instantly, entirely in your browser.
- instantaverage
- In-browserprocessing
- Zerouploads
- Runs in your browser
- Nothing is uploaded
- No signup required
Developer utilities
Regex Tester
Pattern
Input
Output
A match report appears here once you enter a pattern.
Ln 1, Col 1
Waiting for input
Paste, upload or type to begin.
Shortcuts⇧⌘CCopy output⌘LClear input
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Why Kalyvor
Built for people who value their time
Every data tool is fast, private and genuinely free — no dark patterns, no surprises.
Fast cloud processing
Jobs run on dedicated workers and finish in seconds — no queue, no spinner you can go make coffee to.
Auto file deletion
Everything you upload is erased the moment the job finishes. Nothing is written to long-term storage, so there is no retention period to wait out.
Works everywhere
Desktop, tablet or phone, any modern browser. Nothing to install, no plugins, no extensions.
Batch processing
Drop in a folder's worth of files and run the whole set through one tool in a single pass.
Privacy first
Encrypted in transit, never used to train models, never sold. Many tools never send the file at all.
No installation
Open a tab and go. No account needed to start, no download, no licence key to hunt for.
How it works
Regex Tester in three steps
No account, no installation, no manual. It takes about as long to do as it does to read.
- 01
Enter a pattern
Type a regular expression, and pick Ignore Case, Multiline, Dot All or Unicode as needed.
- 02
Paste your sample text
Paste the text you want to test it against. Nothing is uploaded.
- 03
Read the report
Every match, its exact position, and every group it captured — numbered and named.
Questions
Frequently asked questions
Everything worth knowing before you run your first Regex Tester job. Still stuck? Talk to support.
Helpful articles
Guides and walkthroughs for getting more out of Regex Tester.
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A short decision guide for when two tools look like they do the same thing.
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Getting started with Kalyvor
From first upload to finished download in under a minute — the whole flow.
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